<template>
    <div id="app">
    <div class="container">
      <!-- 顶部搜索框模块 -->
      <div class="form-group">
        <div class="input-group">
          <h4>品牌管理</h4>
        </div>
      </div>

      <!-- 数据表格 -->
      <table class="table table-bordered table-hover mt-2">
        <thead>
          <tr>
            <th>编号</th>
            <th>资产名称</th>
            <th>价格</th>
            <th>创建时间</th>
            <th>操作</th>
          </tr>
        </thead>
        <tbody v-if="list.length>0">
          <tr v-for="(item,index) in list" :key="item.id">
            <td>{{index+1}}</td>
            <td>{{item.name}}</td>
            <!-- 如果价格超过100，就有red这个类 -->
            <td :class="item.price< 60?'red':''">{{item.price}}</td>
            <td>{{datetime(item.time)}}</td>
            <td><a href="#" @click="del(item.id)">删除</a></td>
          </tr>
          <tr style="background-color: #EEE">
              <td>统计:</td>
              <td colspan="2">总价钱为: {{total}}</td>
              <td colspan="2">平均价: {{qwe}}</td>
        </tr>
        </tbody>
        <tfoot v-else>
          <tr>
            <td colspan="5" style="text-align: center">暂无数据</td>
          </tr>
        </tfoot>
      </table>

      <!-- 添加资产 -->
      <form class="form-inline">
        <div class="form-group">
          <div class="input-group">
            <input type="text" class="form-control" placeholder="资产名称"  v-model="name"/>
          </div>
        </div>
        &nbsp;&nbsp;&nbsp;&nbsp;
        <div class="form-group">
          <div class="input-group">
            <input type="text" class="form-control" placeholder="价格"  v-model.number="price"/>
          </div>
        </div>
        &nbsp;&nbsp;&nbsp;&nbsp;
        <!-- 阻止表单提交 -->
        <button class="btn btn-primary" @click.prevent="add">添加资产</button>
      </form>
    </div>
  </div>
</template>
<script>
import '@/assets/shanpin.css'
import dayjs from 'dayjs'
export default {
  data() {
    return {
        list:JSON.parse(localStorage.getItem('shangpin')) || [],
        name: "", // 名称
        price: 0, // 价格
        }
        },
methods:{
  datetime(time){
    return dayjs(time).format("YYYY-MM-DD HH:mm:ss")
  },
  del(id){
this.list =this.list.filter((item)=>item.id!==id)
  },
  add(){
    this.list.push({
      id:+new Date(),
      name:this.name,
      price:this.price,
      time:new Date()
    })
    this.name =this.price =''
  }
},
computed:{
   total(){
   
      return this.list.reduce((t,c)=> t +c.price,0)
    },
    qwe(){
   
      return (this.total /this.list.length).toFixed(2)
    }
},
watch:{
  list(val){
    localStorage.setItem('shangpin',JSON.stringify(val))
  }
}
}
</script>
 <style>
    .red {
      color: red;
    }
  </style>